Abstract: Thinking of government as entrepreneur is a unique lens through which to view a subset of government actions. The lens is not a template for an evaluation of government policy; rather, it is a characterization that underscores the government's purposeful intent, ability to act in new and innovative ways, and willingness to undertake policy actions that have uncertain outcomes. Our focus is on the U.S. Small Business Innovation Research (SBIR) program. We argue that the innovative action of government – the innovative use of public resources through the SBIR program to target and support research in small firms – does lessen innovation barriers that cause small firms to underinvest in R&D. However, this government action is subject to entrepreneurial risk, namely the a priori uncertainty that the funded research will result in a commercialized product, process, or service. We quantify the uncertainty that the government accepts in the context of innovation supported by the SBIR program; or stated alternatively, we quantify the probability that a project funded by the SBIR program will fail to commercialize its results. Our empirical results show that the entrepreneurial risk that characterizes the SBIR program is, on average, somewhat more than the probability of failing to get heads on the toss of a fair coin. Importantly, however, our evidence shows that there is a large range in the entrepreneurial risk that the government accepts—across the projects, the predicted probability of failure covers essentially the entire range from 0 to 1.0.